John ii



UNITED STATES PATENT OEEICE.

.lOllN H. BLOODGOOD1 OF NErv YORK, iT. Y.

IMPROVEMENT IN MACHINERY FOR DRAWING AND SPINNING WOOL.

Specication forming part of Letters Patent No. 35,2] l, dated May 13,1862.

To @ZZ whom it may concern.-

Be it known that I, JOHN II. BLOODGOOD, of the city, county, and Stateof New York, have invented a new and useful Improvement in Machinery for`l )rawi ng and Spi nning \Vool and other Fibrous Substances; and I dohere by declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming part of this specificati on, in which-- Figure iis atraiisverse vertical sectional view of the principal working parts of aspinning-frame having my invention applied. Fig. 2 is a .front view ofthe same.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention relates to the use of front drawing-rolls havingI anintermitting action for the purpose of allowing the twist to run backfrom the spindles to the delivery-rolls; and it consists in an apparatusfor preventing` the strain arising from the draft of the bobbin orspindle from actin injurionsly on the twisted yarn above the saiddrawing-rolls, such apparatus consisting, principally, oif two surfacesbetween which the yarn passes and one of which moves toward and from theother to seize the roving or yarn before each intermission in the actionof the drawing-rolls takes place and liberate it immediately after theresumption of the action of the rolls.

The invention is applicable is connection with various constructions ofand modes of applying' the intermittin drawing-rolls. I have representedin the drawings and will describe its application in connection with thesystem of intermitting drawing-rolls which constitutes part of thesubject-matter ofi my Letters Patent dated October l, 1861.

A B are the delivery-rolls.

C D are the intermitting front drawingrolls, the lower one, C, having afixed axis, and the upper one, D, having' its journals or axle supportedin an elbow-lever or yoke, E, working on a fixed fulcrum, a. F is aspring applied to the said elbow-lever to draw the upper roll7 D, towardthe lower one, C.

Gr is the tappet-shaft, carrying the tappets b and e, the latter foracting upon the yoke to raise or throw forward the roll. D to producethe interinissions in the action of the drawing-rolls, and the formerfor operating the apparatus which constitutes my invention.

I l is the tlicr.

I is a bar of wood or iron running the whole length of the machinebetween the drawingrolls (l D and the iliiers, having its front faceconcave, and having stretchei'l across this concave face and secured toit opposite each pair of drawing-rolls (i D a strip of ilu'lia-rubber,d, to constitute an elastic cushion or pad.

J is a lever workingon the fulcrum a close to the yoke E, and havingfirmly secured to it close to its front end a iinger, e, situated infront of the pad (l. The surfaces of the said pad and finger are thesurfaces which constitute my invention, the roving or yarn colored redin the drawings passing between them on its way from the drawing-rolls CDto the fiier Ii. The portion of the lever J in rear of the fulcrum a isheavier than the portion in front of it, and extends back to a positionover the tappet-shaft opposite the tappet I). The pad d and finger e andthe drawing-rolls C D are so arranged relatively to cach other and tothe delivery-rolls and the iiier that the roving or yarn when pressed bythe top roll, D, aga-i n st the bottom roll, C, while the finger c israised from the pad d may pass clear ot' and between the surfaces of dand e, as shown, and when pressed by the finger e against the pad dwhile the top roll, D, is raised or thrown forward by the tappet c theroving or yarn may be clear of though between both rolls.

The operation of t-he iingei and pad is as follows: The tappet b, havinga greater length of surface than the tappet c, is so arranged that itcomes inio operation on the rear end of the lever J and so causes thelinger e to press and hold the yarn against the pad d just before thetappet c comes into operation on the yoke E to raise or throw forwardthe roller D and produce the intermission of the drawing action oi' thesaid rollers, and that it continues in operation on the said lever, andso causes the iin ger e to continue such pressure until after the rollerD has again pressed the roving or yarn against the roller C and causedthe drawing operation to be resumed, and hence, while the drawing actionof the rolls D E is intermitted, the strain produced on the roving oryarn by the draft of the flier bobbin or spindle is preventedy fromacting upon the partially-twisted and consequently soft and weak upperportion of the roving or yarn between the drawing and delivery rolls. Itwill thus be understood that the portion of the roving or yarn above thedraung-rollsl) E is never exposed directly to the varying strain andconsequent jerks resulting from the varying draft of the bobbin orspindle.

The particular form and construction of the surfaces for relieving1 theroving or yarn of the draft of the bobbin or spindle might possibly bevaried without essentiallyT impairing their operation. For instance,rolls moving with the same surface velocity as the drawing-rolls mightbe substituted for the pad d and finger ej and I do not thereforeconfine myself to any construction of such surfaces.

I am aware that drawing-rolls having their surfaces Iiattened orrecessed have been so arranged in two pairs that one pair acts while theother does not, and so relieves the roving or yarn from the strain ofthe bobbin or spindle, and I therefore do not intend to claim the use ofsuch a system of rolls or broadly to claim the use of apparatus appliedbetween the bobbin or spindle and the drawing-rolls to prevent the draftof the bobbin or spindle from affecting the roving or yarn back of thedrawing-rolls; but

Vhat I claim as my invention, and desire JNO. H. BLOODGOOD.

NTitnesses:

R. GAWLEY, JAMES LAIRD.

